Compound-rail construction.



E.'RHODES.

COMPOUND RAIL CONSTRUOTIONQ APPLICATION FILED in. 27, 1912.

2 SHEETS-SHEET 1.

1,038,439,- Patented'Sept.10, 1912.

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GOMPOUND RAIL CONSTRUCTION.

APPLICATION H mn JAN. 27, 1912'.

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Patented Sept. 10, 1912.

UNITED s r s PATENT OFFICE.

EDGAR RHODES, OF LEEDS, ENGLAND, ASSIGNOR TO CONTINUOUS RAIL COMPANY, OFWILMINGTON, DELAWARE, 'A CORPORATION OF DELAWARE.

COMPOUND-RAIL CONSTRUCTION. Y

Specification of Letters Patent.

Patented Sept. 10, 1912.

Application filed January 2?, 1912. SeriaINo. 673,788.

' To all whom it may concern:

Be it known that I, EDGAR RHODES, a subject of the King of Great Britainand Ire.

land, residing at The Briars, Scholes, Leeds,

Yorkshire, England, have invented certaincompression strains to firmlyforce and, maintain said lips agamst the sections ongaged thereby. i

A further object of the invention is to provide a method of uniting thetop and base sections of compound rails by bending.

of holdinglips on one of the sections into engagement with a companionsection and then compressing the holding lips a suflicient amount sothat the outer portions thereof will be elongated in a transverse di'rection and whereby compression strains will be created in the outerportions of said" lips sufficient to force the inner portions of thelips in firm engagement with the portion engaged thereby thus creatingeflicient electrical contactivity between the top and base sections.

Another object of the invention is to provide a method of securinLg thetop wearing sections of a compound rail in place on the base sections bybending at least a portion of a holding lip on one of the sections intoengagement with the companion section and materially reducing thethickness of the metal in the lip and simultaneously therewithelongating the metal in the outer portion of the lip a greaterpercentage than the metal in the inner lip is elongated.

As showinga specific embodiment of the invention, reference is made tothe drawings forming a part hereof. V

Figure 1 shows a perspective view of two parts of base or girder railsections and a top or wearing section secured to one of the basesections, the girder section at the left being shown .out of its normalposition and portlon I of the holding.

the depending flanges on the wearing section between which the lastmentioned base section is normally placed being shown, in the positionwhich they occupy prior to being bent to holding position. .Fig. 2 is atransverse view showing a wearing section in place on the top of a basesection prior to theholding flanges being bent. Fig. 3 is a transverseview of the part shown in Fig. 2 after the holding flanges have beenbent so as to contact with the surfaces engaged thereby. Fig. 4 is atransverse view oit the parts shown in Figs. 2 and 3 after suflicientpressure has been applied to the holding lips" to force the metal in theouter portion; ot said lips transversely and to create compres slonstrains 1n said metal. Fig. 5 is a full size cross sectional Viewpartially broken away, showing the lower portion of a top wearingsection of a compound rail in place on the top portion of a base sectionof the rail prior to bending the holding lips. Fig. 6 is a full sizecross sectional View partially broken away, showing the position of thecompression strains in the lips immediately after theinitial bending ofthe holding lips into engagement with the base section and prior totransversely elongating the lips. Fig. 7 is a full size cross sectionalview partially broken away, showing the position of the permanentcompression strains in the holding lips after the completion of'theoperatio Like characters designate the same parts throughout the.specification.

The base sections are indicated by A and the top or wearing sections byB. The base sections may be of any well known type and comprise thesupporting flanges O,'C, the web E and the flange portions F, F, 10-

catedat the top of the web. The top or wearing section preferablycomprises a tread portion G, a groove portion H to receive the flange ofa car wheel and depending. flanges or lips L, M which are bent andforced againstthe base section with sufiicient pressure to .form anefiicient electrical contact or'connection' between the top section andthe base section.

-In Figs. 2 and 5.the depending flanges L, M are shown in the positionswhich they occupy after the top section has left the rolling mill. -Froman inspection of said figures it will be apparent that the flanges arespaced 2. suflicient distance apart to permill.

wearing section may be seated upon-the base section. g

In Figs. 3 and 6 it will be seen that the flanges L, M have been bentsubstantially into engagement with the edges f, f of the flanges F, -F.In the position shown in Figs. 2 and 5 there are no substantial strainsin the holding lips, as they are in the condition which they-were whenthey left the rolling Previous to the termination of the operation ofbending the lips from the position shown in Figs. 2 and 5 to theposition shown in Figs. 3 and 6, compression strains were created in themetal at the upper inner portion of the lips and tension strains in themetal at the outer portion of the lips at the points marked m t and ktThese compression strains are indicated in Fig. 6 by the series of'-lines m0 and Z a. From a comparison of Figs. 3 and 4 and also Figs. 6and 7 it will be noted that the metal between the points m. and m and Zand Z has been extended in a direct-ion transverse to the direction inwhich the rail extends and that the thickness of these depending lipshas been decreased. This elongation of the metal transverse to thedirection in which the rail extends and the reducing of the thickness ofthe metal in the flange so as to change the'cross sectional shapethereof is effected 'by sufficient pressure applied.

to the outside portion of the flanges to create compressionstrains(which extend in a direction transverse to that in which the railextends) in the outer portion of the flanges whereby theinner portionsof the lips will be forced firmly and permanently against. the edges f,f of the flange portions of thebase section. This transverselyelongating by pressure is effected while the holding lip is incontactwith the section engaged there-' by and the compression strains thuscreated in the outer portion of the holding lips "are indicated by thelines m a and Z 0'. The percentage of transverse elongation of the metalin the outer portion of the lips is greater than is the percentage oftransverse elongation of the lips.

When assembled in position in the track,

of the metalin the inner portion -the joints between the base sections.of the rail and the wearing sections of the rail are staggeredrelative'to each other so that a wearing section will bot-h mechanicallyand electrically connect the base sections. This is possible when thewearing sections are attached to the base sections in the method hereindescribed due to the fact that the compression strains in the outerportions of the lips are sufficient to maintain the lips in firm contactwith the members engaged by the inner portion thereof so that the lipscan serveas eflicient and permanent electrical connecting means betweenthe wearing portions and the girder portions. By this construction theseparate electrical connect-. ing bonds or means such as copperconnectors which are commonly used, may be entirel'y eliminated.

It is obvious that various forms and modifications may be made withoutdeparting from the spirit and scope of the invention as set forth in theappended claims.

I claim as my invention:

1. The method of uniting the-top wearing section of a compound rail tothe base section, both of which sections are held in place by bending atleast one holding lip on one of the sections in engagement with theother section, which method consists in bending said lip into contactwith the sectionwhich it engages and also in applying pressure on theoutside of said lip suflicient in amount to elongate, in a directiontransverse to the direction in which the rail extends, the metal in theouter portion of the lip being acted 1upon, so as to create compressionstrains in said metal at the outside of said 'lip whereby the metal atthe inner portion of the lipwill be firmly pressed against the surfaceof the section with which it engages.

2-. The method which consists in assembling on a base section of acompound rail a wearing section having depending holding flanges,applying lateral pressure to the flanges to bend them into engagementwith the base section and subsequently applying a suflicient pressure tomaterially change the cross sectional shape of at least one of theflanges so as to reduce the thickness of the flange and toelongate it onthe outer portion a greater percentage than on the inner portion whichengages the base section.

3. A compound rail comprising a bottom base section and a top wearingsection held together by bent holding lips which have the metal on theouter portion compressed a sufficient amount to create compressionstrains therein whereby the lips will remain firmly pressed against thesurface with which the inner side of the lips contact.

4. A compound rail comprising a longitu-dinally extending base sectionand a longitudinally extending top wearin section held in placethereupon, one of sai sections having integral therewith at least onebent holding lip in which there exist at the outer sides thereofcompression strains that extend in a direction transverse to that inwhich the rails eittend,

- 5. The method of securing the top wearing section of a compound railto the bottom section thereof, which comprises the bending of at least aportionof a holding lip on one of the sections into engagement with thecompanion section and materially reducing the thickness of the metal inthe lip and simultaneously therewith elongating the metal in the outerportion of the holding lip a greater percentage than the metal in theiiner portion of'the holding "lip is elongate 6. The method of securingthe top and bottom sections of compound rails which comprises thematerially reducing of the thickness of the metal in a holding lip onone of the sections after the portion of a lip being worked upon hasbeen brought into engagement with the section to be engaged thereb andwhile the reducing action is beto a greater percentage than the metal inthe inner portion of the lip flows.

This specification signed and witnessed this 25th day of January, A. D.,1912.

. EDGAR RHODES. Signed in the presence of;- EDWIN" A. PACKARD, G.MCGRANN.

